Definition 3.7 [1]}
A tensor \(\mathcal {A}= (a_{i_1 i_2 ... i_m}) \in T_{m,n} \)  is said to be \(R\) -tensor if there exists no \((x, t)\in (\mathbb {R}^n_+ \backslash \lbrace  0\rbrace ) \times \mathbb {R}_+ \) such that
\(\begin{split}(\mathcal {A}x^{m-1})_i + t =0 & \mbox{ if } x_i > 0, \\(\mathcal {A}x^{m-1})_i + t \ge 0 & \mbox{ if } x_i = 0.\end{split}\) 
